package me.zhengjie.config.thread;

import org.springframework.stereotype.Component;

import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * Description: 自定义线程名称 .<br>
 *
 * @author jm
 * @since 2020/1/20
 */
@Component
public class TheadFactoryName implements ThreadFactory {
    private static final AtomicInteger POOL_NUMBER = new AtomicInteger(1);
    private final ThreadGroup group;
    private final AtomicInteger threadNumber = new AtomicInteger(1);
    private final String namePrefix;

    public TheadFactoryName() {
        this("se-pool");
    }

    private TheadFactoryName(String name) {
        SecurityManager s = System.getSecurityManager();
        group = (s != null) ? s.getThreadGroup() :
            Thread.currentThread().getThreadGroup();
        //此时namePrefix就是 name + 第几个用这个工厂创建线程池的
        this.namePrefix = name +
            POOL_NUMBER.getAndIncrement();
    }

    @Override
    public Thread newThread(Runnable r) {
        // 此时线程的名字 就是 namePrefix + -thread- + 这个线程池中第几个执行的线程
        Thread t = new Thread(group, r,
            namePrefix + "-thread-" + threadNumber.getAndIncrement(),
            0);
        if (t.isDaemon()) {
            t.setDaemon(false);
        }
        if (t.getPriority() != Thread.NORM_PRIORITY) {
            t.setPriority(Thread.NORM_PRIORITY);
        }
        return t;
    }
}
